---
description: Ensures a trackBy function is used.
options: null
optionsDescription: Not configurable.
rationale: The use of 'trackBy' is considered a good practice.
ruleName: template-use-track-by-function
type: maintainability
typescriptOnly: true
layout: rule
title: 'Rule: template-use-track-by-function'
optionsJSON: 'null'
---